package org.projectodd.stilts.stomp.protocol.websocket;

/*
 * Copyright 2010 Red Hat, Inc.
 *
 * Red Hat licenses this file to you under the Apache License, version 2.0
 * (the "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at:
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */

import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.util.CharsetUtil;

/**
 * The default {@link WebSocketFrame} implementation.
 *
 * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
 * @author <a href="http://gleamynode.net/">Trustin Lee</a>
 * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
 */
public class DefaultWebSocketFrame implements WebSocketFrame {

    private FrameType type;
    private ChannelBuffer binaryData;

    /**
     * Creates a new empty text frame.
     */
    public DefaultWebSocketFrame() {
        this(null, ChannelBuffers.EMPTY_BUFFER);
    }
    
    public DefaultWebSocketFrame(FrameType frameType) {
        this( frameType, ChannelBuffers.EMPTY_BUFFER );
    }

    /**
     * Creates a new text frame from with the specified string.
     */
    public DefaultWebSocketFrame(String textData) {
        this(FrameType.TEXT, ChannelBuffers.copiedBuffer(textData, CharsetUtil.UTF_8));
    }

    /**
     * Creates a new frame with the specified frame type and the specified data.
     *
     * @param type
     *        the type of the frame. {@code 0} is the only allowed type currently.
     * @param binaryData
     *        the content of the frame.  If <tt>(type &amp; 0x80 == 0)</tt>,
     *        it must be encoded in UTF-8.
     *
     * @throws IllegalArgumentException
     *         if If <tt>(type &amp; 0x80 == 0)</tt> and the data is not encoded
     *         in UTF-8
     */
    public DefaultWebSocketFrame(FrameType type, ChannelBuffer binaryData) {
        this.type = type;
        this.binaryData = binaryData;
    }

    public FrameType getType() {
        return type;
    }

    public boolean isText() {
        return this.type == FrameType.TEXT;
    }

    public boolean isBinary() {
        return this.type == FrameType.BINARY;
    }

    public ChannelBuffer getBinaryData() {
        return binaryData;
    }

    public String getTextData() {
        return getBinaryData().toString(CharsetUtil.UTF_8);
    }

    public void setBinaryData(ChannelBuffer binaryData) {
        this.binaryData = binaryData;
    }
    
    public void setTextData(String textData) {
        this.binaryData = ChannelBuffers.copiedBuffer(textData, CharsetUtil.UTF_8);
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() +
               "(type: " + getType() + ", " + "data: " + getBinaryData() + ')';
    }
}
